Abrading machine



Feb; 11, 11936,, F. RICKS ABRADING MACHINE Filed Jan. 23, 1935 3 Sheets-Sheet l Feb, 11, 1936. F. RICKS 9 v ABRAD'ING MACHINE Filed Jan. 23, 1955 3 Sheets-Sheet 2 Feb. 111, 1935. F, c s '2,@3@,153

ABRADING MACHINE Filed Jan. 2 19.33. 3 Sheets-Shet 5 Patented Feb. 11, 1936 PATENT OFFICE ABRADING MACHINE Fred Ricks, Leicester, England, assignor to United Shoe Machinery Corporation, Paterson, N. J a corporation of New Jersey Application January 23, 1933, Serial No. 652,967 In Great Britain February 4, 1932 1 Claim.

This invention relates to abrading machines and is herein illustrated as embodied in a machine for performing various buffing operations upon shoes. These operations on shoes call for considerable care and judgment on the part of the operators performing them and. since, in the course of a days work, an operator may have to handle a very large number of shoes, it is highly desirable that his working conditions should be capable of adjustment to suit his individual needs. In particular, it is desirable, in order to avoid excessive fatigue and to enable the operator to perform the highest quality of work, to maintain the bufling tools at the most convenient level for the individual operator, and the most suitable level for one operator may be considerably different from the most suitable level for a taller or shorter operator.

Accordingly, an object of this invention is to provide a bufling machine having provision for the heightwise adjustment of one or more bufling tools.

In the illustrated construction several abrading tools, namely, a pair of bottom scouring rolls,

\ a shank bufing disk, and a heel breast bufing roll are all mounted upon a bracket having provision for heightwise adjustment. The bracket is pivotally supported upon the machine frame about a horizontal axis, and the several tools are driven from a shaft which is coaxial with the pivotal mounting of the bracket. The coaxial relation between the shaft and the pivotal mounting of the bracket afiords an advantage in that it enables the bracket to be adjusted about its pivotal mounting without disturbing the driving connections between the shaft and the abrading tool.

The various features of the invention will be best understood from the following description of the preferred embodiment thereof selected for purposes of illustration and shown in the accompanying drawings, in which,

Fig. 1 is a right hand side elevation of the illustrative machine;

Fig. 2 is a front elevation of the said machine drawn to the same scale as Fig. 1;

Fig. 3 is a detail sectional view showing certain parts seen in Fig. 1 drawn to a larger scale than in Fig. 1; and

Fig. 4 is a plan view drawn to a larger scale than Fig. 1 of the upper portion of the said machine, certain parts at the top of the machine being omitted.

The illustrative machine comprises a base framework I mounted upon which is a casting 3 provided at its rear end with two upstanding arms 5 one on each side of the machine. Mounted in each of these arms 5 is a sleeve 6 shown only in Fig. 4 through axial bores in which sleeves passes a horizontal shaft 1 substantially coaxial with the sleeves 6 and extending from left to right of 5 the machine, the bores in the sleeves 6 being of slightly larger diameter than is the shaft 1 and the said shaft being actually supported near either end by ball bearings 8' (see Fig. 4) mounted in arms l0 extending from the casting 3. One of 10 the arms I6 is adjacent to and integral with one of the arms 5, the arm l0 and the arm 5 together constituting, in effect, a bifurcated extension of the casting 3; and the same is true of the other arm [0 and the other arm 5. J ournaled in bearings at the foot of the base framework l of the machine is a power driven horizontal shaft 9 which carries at its left hand end a pair of fixed and loose pulleys Ill and H3 for engagement with a belt H5 driven from any suitable source of power. Cooperating with the belt H5 is a belt shifter of well-known construction operated by a hand lever II! for controlling the drive of the shaft 9. Upon the right hand end portion of the shaft 9 is fixed a pulley l l. A considerably smaller pulley I5 is mounted on the shaft 1, and a belt I3 runs over these two pulleys thereby rotating the shaft 1 at a high speed. Above the casting 3 the machine is provided with a large flat bracket I! (Fig. 4) having at its rear portion two arms I9. Each of the arms [9 has formed in it a bearing, and these bearings engage respectively the sleeves 6 to provide for the bracket I! a pivotal mounting about the axis of the shaft 1. This arrangement renders the bracket ll capable of heightwise swinging movement about the axis of the shaft 1. In threaded relation with a short transverse rod or swivel pin 21 (Figs. 3 and 4) rotatably mounted in two upstanding flanges 23 formed on the upper surface of the bracket IT and substantially centrally situated thereon is a large vertical screw 25 which passes through a hole in the bracket and at its lower end bears against a cup shaped portion 21 of an upstanding rib 29 formed internally in the said casting 3. The arrangement is such that rotation of the screw 25 causes the bracket I! to turn about the pivot at its rear end and so raises or lowers the front portion of the said bracket. To maintain the bracket l'l securely in adjusted position the said bracket is provided with downwardly extending side portions 3| (Fig. 2) from which project bolts 33 rigidly secured thereto. The bolts pass through arcuate slots 35 (Fig. 1) in the casting 3 and by tightening nuts 3'! upon the ends of the bolts 33 the bracket |1 may be locked in position.

From the front of the bracket 1 there project two short arms 39 (Fig. 4) which carry bearings 40 in which bearings is mounted a bottom scouring roll carrying shaft 4|. Two bottom scouring rolls 43, 45 (Fig. 2) are carried on the shaft 4|, one roll being normally covered with rough abrasive paper and the other with fine abrasive paper. Towards its right hand end the bottom scouring roll carrying shaft 4| has a pulley 41 secured to it, and a belt 49 passes round this pulley 41 and.v

also round a pulley 5| formed integrally with the pulley I5 on the horizontal shaft 1-a1read'ymen-'- tioned. The arrangement may conveniently be such that the bottom scouring roll carrying shaft 4| is rotated by the belt 49 at aspeed, of about 4000 revolutions per minute.

It is usual in driving bottom scouring rolls, to

reciprocate the rolls through the shaft upon which they are mounted. For this purpose. there is provided mechanism comprising an arm. 53

bolted to the top surface of the bracket l1 and.

at the right hand side thereof andextending to the right of the said bracket. At the. righthand end of this army 53, is, supported a vertical stud 55. which forms a centrally situated pivot for a lever 51 extending substantially forwardly and rearwardly of the machine. lever 51 is provided with a. short vertical stud 59 which carries at its lower end acam roll 6| which.

enters a cam groove 60 cut, in the extended hub 52. of a pulley 53. carriedat near. the, extreme right hand end of the horizontal shaft 1 and fixed 1ongitudinally on the shaft but capable of rotation relatively to the-shaft. A belt 65 runs round the.

pulley 63 and, also round asmall pulley 61 on the shaft 9; the arrangement being such, that the pulley 63 with the extendedhub is. drivenv at. a.

very much. slower speed than, the shaft 1 upon which it is carried, for example, at. less than. a

tenth, of the speed. At its. forward end the. lever 51 is forked and the fork arms pass one above and one below the bottom scouring roll carrying shaft 4 Each fork arm carries a short stud 69, and both studs, 69 enter radial holes. formedin the periphery of a sleeve 10. (seen, only in Fig. 4)

which is rotatably mounted onthe shaft 4| and. prevented from axial movement by the provision of two collars 1| fixedrelatively to the, shaft 4|. These collars 1|. are secured to a reduced portion at the right hand end of the, shaft 4| by means of nuts 12 in threaded relationwith. the said. shaft 4|. Actually the arrangement. is, such that the sleeve 10 is rotatably carried on. a short sleeve (not shown) which serves to space the. collars 1|. On tightening the nuts 12 the collars 1| are clamped between these nuts and the shoulder on the shaft 4| where the reduced end portion of the shaft 4| begins, but the shortsleeve justmentioned prevents the collars 1| binding the: sleeve 10 tightly between them. The comparatively slow rotation of the hubbed pulley 63, conveys, through the cam groove in its hub, oscillatory movement to the lever 51 about its central pivot 55 and this in turn communicates a reciprocatory movement to the bottom scouring roll. carrying shaft 4|, the frequency of this reciprocatory movement being much less than the speed of rotation of the shaft 4|. For example while the bottom scouring roll carrying shaft may as already mentioned be rotated at a speed of about 4000 revolutions per minutev we have found it convenient to reciprocate it at a frequency of only 250 reciprocations per minute.

At its rear. end .this.

The top and rear surfaces of each of the bottom scouring rolls 43, 45 are covered by pivoted members 13 and 15 respectively which, besides performing a guarding function, also assist in the collection of dust from the said rolls. These members 13 and 15, which thus constitute dust hoods, are pivoted to the front surface of the bracket l1.

To a face 16 (Fig. 4) at the left hand side of the top surface of the bracket I1 is bolted a supporting structure 11 for a shank buffing tool 19 of the: disk type and for a frusto-conical abrasive tool 8| of relatively small diameter for operating uponcurved surfaces such as are presented by Louis heel breasts. The frusto-conical abrasive tool 8 l-ismounted-at the left hand end of a shaft 83 which rotates in suitable bearings formed in the. saidv supporting structure 11, the shaft 83 being. driven by a belt 85 which runs round a pulley 01 at the right hand end of the shaft 83 and also roundapulley 89on the horizontal shaft 1... Thisbelt 85 passes througha clearance hole 90 (see Fig. 4) cutin the bracket H. The shank,

buffing tool 19 is carried at the lower end of. a

substantially vertical shaft 9| also journaled; in.

the; supporting structure 11. The shank buifing tool 19 is positioned above the left hand, bottom is also. driven,

porting structure 11 is conveniently constructed.

so that, it has a duct formed in it communicating. with the open end of adust hood 91 located just, behind the shank bufling tool 19.

to a suitable suction conduit |0 whichleadsr to the intake of an exhaust blower I03, securedupon.

the frame I and driven by a belt I09 fromthe main shaft 9.

a dust collecting duct fl5l-which divides into, two

branches which open immediately behind each.

of. the bottom scouring rolls 43 and .45-,.r espectiv e- 1y,.in. order to collect dust formed during. the op.- erationof these rolls. The conduit I05 leads to. the suction conduit WI, and has a flexible portionv to accommodate the up and down. adjust.- ments of the bracket l1. Beneath the. rolls. 43. and. 45 and securedto the frame I is a dustreceptacle or pan I01 having a large openingto receive dust from the work. The dust pan, |01 also communicates with the suctionconduit. |0.|.

It will be realized that by adjusting the. heightwise position of the bracket H the position ofqthe, buffing and scouring instrumentalities may readily be adjustedto the position most suitedto any particular operator. When the operator desires to adjust the heightwise position of the. bracket |1 he has merely to loosen the nuts 31 and toy rotate the screw 25 (which is provided withehead 99 so shaped that a spanner'or like tool :may. be readily applied thereto, to aid rotation of: the screw). The operator can thus adjust theheight of thescouring instrumentalities to: the. position he finds most convenient. a. result which asal.- ready mentioned hereinbefore isa very desirable one. It will be observed that the drivingmeans already described for the various scouring instrumentalities are so designed and arrangeclthat they are unaifected by heightwise adjustment of the tools. When the operator has suitablscadjusted the height of the scouring instrumentalitieshe will once more tighten up the nuts 31 thereby firmly securing the bracket H in. adjusted position.

The other end. of the duct is connected by av flexible conduit. 99,

The machine is alsoprovidedwith 10 ameter of said shaft, a bracket pivotally mounted on said sIeeves, a bufling tooI earned by said bracket, driving means between said shaft and said bufling tool, a swivel pin mounted in said bracket, a bolt threaded through said swivel pin, and a cupped abutment supported by said frame, said bolt serving to adjust the angular position of said bracket about the axis of said shaft and thereby to determine the level of said buffing tool.

FRED RICKS. 

